CG Vyapam Science MCQ Chapter Wise For Prayogshala Pricharak

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Chapter 23: Our Environment: Energy Flow in the Ecosystem – Important MCQs

  1. Which of the following is a biotic component of the ecosystem?
    A. Air
    B. Soil
    C. Plants
    D. Water
    ✔️ Answer: C. Plants
  2. Which of the following organisms is a producer?
    A. Grass
    B. Deer
    C. Lion
    D. Vulture
    ✔️ Answer: A. Grass
  3. In a food chain, energy flow is:
    A. Bidirectional
    B. Unidirectional
    C. Circular
    D. Multidirectional
    ✔️ Answer: B. Unidirectional
  4. What percentage of energy is transferred from one trophic level to the next?
    A. 90%
    B. 50%
    C. 10%
    D. 100%
    ✔️ Answer: C. 10%
  5. Which of the following is a decomposer?
    A. Bacteria
    B. Lion
    C. Deer
    D. Tiger
    ✔️ Answer: A. Bacteria
  6. The correct sequence of the food chain is:
    A. Producer → Decomposer → Consumer
    B. Producer → Consumer → Decomposer
    C. Consumer → Producer → Decomposer
    D. Decomposer → Producer → Consumer
    ✔️ Answer: B. Producer → Consumer → Decomposer
  7. Which gas is mainly responsible for the greenhouse effect?
    A. Oxygen
    B. Carbon dioxide
    C. Nitrogen
    D. Hydrogen
    ✔️ Answer: B. Carbon dioxide
  8. Which of the following is an abiotic component of the ecosystem?
    A. Plants
    B. Animals
    C. Soil
    D. Fungi
    ✔️ Answer: C. Soil
  9. Which of the following is a primary consumer?
    A. Grass
    B. Rabbit
    C. Tiger
    D. Fungus
    ✔️ Answer: B. Rabbit
  10. An example of a food web is:
    A. Linear chain of organisms
    B. Simple feeding pathway
    C. Interconnected food chains
    D. None of these
    ✔️ Answer: C. Interconnected food chains

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Manish Pandey
Manish Pandey

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